6690856 has 16 divisors (see below), whose sum is σ = 12662100. Its totient is φ = 3314304.

The previous prime is 6690847. The next prime is 6690863. The reversal of 6690856 is 6580966.

It can be written as a sum of positive squares in 2 ways, for example, as 6502500 + 188356 = 2550^2 + 434^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2965 + ... + 4708.

Almost surely, 2^6690856 is an apocalyptic number.

It is an amenable number.

6690856 is a deficient number, since it is larger than the sum of its proper divisors (5971244).

6690856 is a wasteful number, since it uses less digits than its factorization.

6690856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7788 (or 7784 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6690856 is about 2586.6689003427. The cubic root of 6690856 is about 188.4345613603.

The spelling of 6690856 in words is "six million, six hundred ninety thousand, eight hundred fifty-six".